| 1 | /* |
| 2 | * lttng-clock-override-test.c |
| 3 | * |
| 4 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | * Copyright (C) 2015 Jonthan Rajotte <jonathan.rajotte-julien@efficios.com> |
| 6 | * |
| 7 | * SPDX-License-Identifier: MIT |
| 8 | * |
| 9 | * Based on lttng-clock-override-example.c from LTTng-ust example |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <stdlib.h> |
| 14 | #include <common/compat/time.hpp> |
| 15 | #include <string.h> |
| 16 | #include <stdio.h> |
| 17 | #include <lttng/lttng-export.h> |
| 18 | #include <lttng/ust-clock.h> |
| 19 | |
| 20 | static |
| 21 | uint64_t plugin_read64(void) |
| 22 | { |
| 23 | /* Freeze time */ |
| 24 | return 0; |
| 25 | } |
| 26 | |
| 27 | static |
| 28 | uint64_t plugin_freq(void) |
| 29 | { |
| 30 | return 1000; /* 1KHz clock (very coarse!) */ |
| 31 | } |
| 32 | |
| 33 | static |
| 34 | int plugin_uuid(char *uuid) |
| 35 | { |
| 36 | const char myuuid[] = "83c63deb-7aa4-48fb-abda-946f400d76e6"; |
| 37 | memcpy(uuid, myuuid, LTTNG_UST_UUID_STR_LEN); |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static |
| 42 | const char *plugin_name(void) |
| 43 | { |
| 44 | return "lttng_test_clock_override"; |
| 45 | } |
| 46 | |
| 47 | static |
| 48 | const char *plugin_description(void) |
| 49 | { |
| 50 | return "Freeze time with 1KHz for regression test"; |
| 51 | } |
| 52 | |
| 53 | LTTNG_EXPORT void lttng_ust_clock_plugin_init(void); |
| 54 | void lttng_ust_clock_plugin_init(void) |
| 55 | { |
| 56 | int ret; |
| 57 | |
| 58 | ret = lttng_ust_trace_clock_set_read64_cb(plugin_read64); |
| 59 | if (ret) { |
| 60 | fprintf(stderr, "Error setting clock override read64 callback: %s\n", |
| 61 | strerror(-ret)); |
| 62 | goto error; |
| 63 | } |
| 64 | ret = lttng_ust_trace_clock_set_freq_cb(plugin_freq); |
| 65 | if (ret) { |
| 66 | fprintf(stderr, "Error setting clock override freq callback: %s\n", |
| 67 | strerror(-ret)); |
| 68 | goto error; |
| 69 | } |
| 70 | ret = lttng_ust_trace_clock_set_uuid_cb(plugin_uuid); |
| 71 | if (ret) { |
| 72 | fprintf(stderr, "Error setting clock override uuid callback: %s\n", |
| 73 | strerror(-ret)); |
| 74 | goto error; |
| 75 | } |
| 76 | |
| 77 | ret = lttng_ust_trace_clock_set_name_cb(plugin_name); |
| 78 | if (ret) { |
| 79 | fprintf(stderr, "Error setting clock override name callback: %s\n", |
| 80 | strerror(-ret)); |
| 81 | goto error; |
| 82 | } |
| 83 | |
| 84 | ret = lttng_ust_trace_clock_set_description_cb(plugin_description); |
| 85 | if (ret) { |
| 86 | fprintf(stderr, "Error setting clock override description callback: %s\n", |
| 87 | strerror(-ret)); |
| 88 | goto error; |
| 89 | } |
| 90 | |
| 91 | ret = lttng_ust_enable_trace_clock_override(); |
| 92 | if (ret) { |
| 93 | fprintf(stderr, "Error enabling clock override: %s\n", |
| 94 | strerror(-ret)); |
| 95 | goto error; |
| 96 | } |
| 97 | |
| 98 | return; |
| 99 | |
| 100 | error: |
| 101 | exit(EXIT_FAILURE); |
| 102 | } |